JPS6111948Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electrical device, such as a gas-insulated electrical device, in which a conductor is housed in a container.

1 and 2 show conventional electrical equipment. In the figure, 1 is a tubular non-magnetic metal container filled with an insulating gas, and flanges 1a are provided at both ends. 2 is the first conductor of each of the three phases housed in the container 1; 3 is the second conductor made of copper, aluminum, etc.; Each one is the first
It is provided facing the conductor 2 of. 4 is an insulating support member supporting the second conductor 3, and 5 is a shorting member, which short-circuits one end of the first conductor 2 to each other. Note that the other end (not shown) of the second conductor 3 is short-circuited with a short-circuiting member (not shown).

In such a configuration, the magnetic flux generated by the current flowing through the first conductor 2 interlinks with the nearby second conductor 3 and forms a closed loop formed by the second conductor 3 and the shorting member 5. An induced current flows through the Due to this induced current, the induced current generated in the container 1 is reduced, and the temperature rise in the container 1 is suppressed to a low level.

By the way, since the conventional electrical device has the second conductor 2 provided inside the container 1, it has the disadvantage that when a high voltage is applied to the first conductor 2, the electric field strength inside the container 1 increases. Ta.

This invention was made in order to eliminate the above-mentioned drawbacks.

The figures will be explained below. In FIGS. 3 and 4, 1, 1a, and 2 are the same as the conventional ones. 6
is a container 1 in which the first conductor 2 and the container 1 are close to each other.
A second conductor 7 provided on the outer surface facing the first conductor 2 is a short-circuiting member that short-circuits the ends of each second conductor 6, and the second conductor 7 on the opposite side of the second conductor 6 A similar arrangement is also provided at the end (not shown).

The magnetic flux generated by the current flowing through the first conductor 2 passes through the container 1 and leaks to the outside of the container 1 .
This leakage amount increases as the conductivity of the container 1 decreases.
Therefore, by providing the second conductor 6 outside the container 1, the induced current flows in the opposite phase to the current in the first conductor 2 due to the leaked magnetic flux. Therefore, the total magnetic flux is reduced, and the induced current generated in the container 1 is reduced, and the loss generated in the container 1 can be reduced as in the conventional case.

In such a configuration, the second conductor 6 is provided outside the container 1, which eliminates the problem of electric field strength within the container 1, and allows the container 1 to be made smaller.
Further, the shorting member 7 of the second conductor 6 does not need to be considered on the electric surface, and is easier to manufacture than in the past.

5 and 6 show other embodiments of this invention. In this other embodiment, the end of the second conductor 6 is electrically connected to one section of the container by the shorting member 8, and the second conductor 6 is electrically connected to the end of the container 1. ing.

7 and 8 show other embodiments of this invention. Another embodiment of this invention provides a second parallel to the axial direction around the outside of the container 1 of the three-phase separated gas insulated equipment.
conductors 6 are provided, and the ends of each second conductor 6 are connected by a shorting member 7.

Note that it is also effective to weld the second conductor 6 to the container 1 over the entire length thereof.

As described above, according to this invention, a second conductor facing the first conductor is provided outside the container housing the first conductor of each of the three phases, and the end of the second conductor is By interconnecting them, the electric field strength within the container can be relaxed and the container can be made smaller.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view of a conventional electrical device, Fig. 2 is a side sectional view of Fig. 1, Fig. 3 is a perspective view showing the main parts of an embodiment of this invention, and Fig. 4 is Fig. 3. FIG. 5 is a perspective view showing the main parts of another embodiment of this invention, FIG. 6 is a front sectional view of FIG. 5, and FIG. 7 is a main part of another embodiment of this invention. FIG. 8 is a front sectional view of FIG. 7. In the figure, 1
is a container, 2 is a first conductor, and 6 is a second conductor. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A container made of a tubular non-magnetic material houses three-phase first busbars extending in the axial direction, and a second conductor facing each of the first busbars is provided on the outside of the container. , an electrical device characterized in that each end of each of the second conductors is electrically connected.